For the reaction 2NO₂ ⇌ 2NO + O₂, K_c = 1.8 x 10⁻6 at 184°C and R = 0.0821. What is the relationship between Kₚ and K_c at 184°C?
a) Kₚ = K_c
b) Kₚ = K_c * (RT)^Δn
c) Kₚ = 1 / K_c
d) Kₚ = K_c / RT